Table 3.

Hydrogen bonds and salt links between residues of VP39 and methylated bases or m⁷G

Protein	Atom	Ligand	Atom	Distance, Å
				Hydrogen bonds (≤3.5 Å)
VP39	Asp 182 OD1	m3Ade	N(6)H2	3.4
VP39			m1Ade	None
VP39	Glu 233 OE1	m3Cyt	N(1)H	3.3
VP39			m1Cyt	None
VP39*	Glu 233 OE1	m7G	N(1)H	3.0
	Glu 233 OE1		N(2)H2	3.4
	Asp 182 OD1		N(2)H2	3.2
	Asp 182 OD2		N(2)H2	3.4
D182A	Glu 233 OE1	m7G	N(1)H	2.8
	Glu 233 OE1		N(2)H2	3.4
E233Q	Gln 233 OE1	m7G	N(1)H	3.0
	Asp 182 OD1		N(2)H2	3.5
				Salt links (≤4.0 Å)
VP39	Glu 233 OE1	m1Ade	N(7)	3.1
VP39	OE1	m3Ade	N(7)	4.0
VP39	OE1	m1Cyt	N(3)H	3.4
VP39	OE1	m3Cyt	N(1)H	3.3
VP39*	OE1	m7G	N(1)H	3.0
D182A	OE1	m7G	N(1)H	2.8

^*Data are from ref. 6.